My question is, why would anyone want to wear a watch made with steel from the shipwreck of the Titanic? Hardcore Titanic movie fans? 
Human taste change
Steel wasn't lasting, hence human chasing precious metal like gold and platinum for their watches
When stainless steel invented... PP, AP, Rolex... All into it, gd daily wear watch. Pp selling it more expensive than gold! I don't understand it either
Then out of sudden we all into era of new tech new material, lighter, stronger...
Titanium - ceramic - carbon fiber ....
But human nvr stop changing, so as their taste...
Now Ppl wearing brass, bronze and silver ... And appreciating the patina...
So y nota rusted steel with real history !